code: def simplify_time_features(name):
      """Simplifies a time feature predictor name.
  
      Eliminates the levels and unnecessary characters in a time feature predictor's name.
      If the original name is like
      "C(Q('str_dow'), levels=['1-Mon', '2-Tue', '3-Wed', '4-Thu', '5-Fri', '6-Sat', '7-Sun'])[T.2-Tue]",
      it will be simplified to "str_dow_2-Tue".
      If the original name is like "str_dow[T.7-Sun]", it will be simplified to "str_dow_7-Sun".
      If the original name is like "toy", it will be kept as it is.
      If any ``cst.TimeFeaturesEnum`` is not in the name, the original name will be returned.
  
      Parameters
      ----------
      name : `str`
          The predictor name.
  
      Returns
      -------
      simplified_name : `str`
          The simplified name.
      """
      if any(
          [
              x in name
              for x in cst.TimeFeaturesEnum.__dict__["_member_names_"]
          ]
      ):
          result = re.search(r"(.*)\[T.(.*)\]", name)
          if result is not None:
              name = result.group(1)
              level = "_" + result.group(2)
              if "levels" in name:
                  name_result = re.search(r"\('(.*)'\),", name)
                  if name_result is not None:
                      name = name_result.group(1)
          else:
              level = ""
          if (
              name == cst.TimeFeaturesEnum.is_weekend.value
          ):  # is_weekend only has two levels
              level = ""
          name = name + level
      return name
  
file_path: greykite/greykite/algo/common/col_name_utils.py
imports: import re
  from greykite.common import constants
label_desc: Use image node_id 2 for calling a global function with example usage: simplify_time_features(name) and returns: name